US3055174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable noise suppressor for jet engines
Assignee: Boeing Co
•
Filing: 1957-01-14
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Granted: 1962-09-25
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Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Charles A Grotz
- 👤 William A Reinhart
- 👤 Kenneth V Swanke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:27
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/54; F02K1/56; F02K1/40; F02K1/42; F02K1/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2570629A
Cited
FR1102597A
Cited
US2950595A
Cited
US2930185A
Cited
US2865169A
Cited
US2845775A
Cited
US2874538A
Cited
US2938335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |